Vertex ID, Instance ID, and Stereo Eye Index ShaderGraph nodes for URP and HDRP

com.unity.render-pipelines.high-definition/Editor/Material/ShaderGraph/HDStructFields.cs

@@ -29,7 +29,7 @@ public struct AttributesMesh
             public static FieldDescriptor instanceID = new FieldDescriptor(AttributesMesh.name, "instanceID", "", ShaderValueType.Uint,
                 "INSTANCEID_SEMANTIC", "UNITY_ANY_INSTANCING_ENABLED");
             public static FieldDescriptor vertexID = new FieldDescriptor(AttributesMesh.name, "vertexID", "ATTRIBUTES_NEED_VERTEXID", ShaderValueType.Uint,
-                "SV_VertexID", subscriptOptions: StructFieldOptions.Optional);
+                "VERTEXID_SEMANTIC", subscriptOptions: StructFieldOptions.Optional);
         }
 
         public struct VaryingsMeshToPS

com.unity.render-pipelines.high-definition/Editor/Material/ShaderGraph/Templates/ShaderPass.template

@@ -43,6 +43,7 @@ Pass
     $AttributesMesh.uv2:                #define ATTRIBUTES_NEED_TEXCOORD2
     $AttributesMesh.uv3:                #define ATTRIBUTES_NEED_TEXCOORD3
     $AttributesMesh.color:              #define ATTRIBUTES_NEED_COLOR
+    $AttributesMesh.vertexID:           #define ATTRIBUTES_NEED_VERTEXID
     $VaryingsMeshToPS.positionRWS:      #define VARYINGS_NEED_POSITION_WS
     $VaryingsMeshToPS.normalWS:         #define VARYINGS_NEED_TANGENT_TO_WORLD
     $VaryingsMeshToPS.texCoord0:        #define VARYINGS_NEED_TEXCOORD0

com.unity.render-pipelines.universal/Editor/ShaderGraph/Templates/ShaderPass.template

@@ -44,6 +44,7 @@ $Attributes.uv1: #define ATTRIBUTES_NEED_TEXCOORD1
 $Attributes.uv2: #define ATTRIBUTES_NEED_TEXCOORD2
 $Attributes.uv3: #define ATTRIBUTES_NEED_TEXCOORD3
 $Attributes.color: #define ATTRIBUTES_NEED_COLOR
+$Attributes.vertexID: #define ATTRIBUTES_NEED_VERTEXID
 $Varyings.positionWS: #define VARYINGS_NEED_POSITION_WS
 $Varyings.normalWS: #define VARYINGS_NEED_NORMAL_WS
 $Varyings.tangentWS: #define VARYINGS_NEED_TANGENT_WS

com.unity.shadergraph/CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [12.0.0] - 2021-01-11
 
+### Added
+  - Stereo Eye Index, Instance ID, and Vertex ID nodes added to the shadergraph library.
+
 ### Changed
 - Change Asset/Create/Shader/Blank Shader Graph to Asset/Create/Shader Graph/Blank Shader Graph
 - Change Asset/Create/Shader/Sub Graph to Asset/Create/Shader Graph/Sub Graph

com.unity.shadergraph/Editor/Data/Nodes/Input/Geometry/InstanceIDNode.cs

@@ -0,0 +1,34 @@
+using System.Reflection;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Input", "Geometry", "Instance ID")]
+    class InstanceIDNode : CodeFunctionNode
+    {
+        public override bool hasPreview { get { return false; } }
+
+        public InstanceIDNode()
+        {
+            name = "Instance ID";
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("UnityGetInstanceID", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string UnityGetInstanceID([Slot(0, Binding.None)] out Vector1 Out)
+        {
+            return
+@"
+{
+#if UNITY_ANY_INSTANCING_ENABLED
+    Out = unity_InstanceID;
+#else
+    Out = 0;
+#endif
+}
+";
+        }
+    }
+}

com.unity.shadergraph/Editor/Data/Nodes/Input/Geometry/VertexIDNode.cs

@@ -0,0 +1,36 @@
+using UnityEngine;
+using UnityEditor.Graphing;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Input", "Geometry", "Vertex ID")]
+    class VertexIDNode : AbstractMaterialNode, IMayRequireVertexID
+    {
+        private const int kOutputSlotId = 0;
+        private const string kOutputSlotName = "Out";
+
+        public override bool hasPreview { get { return false; } }
+
+        public VertexIDNode()
+        {
+            name = "Vertex ID";
+            UpdateNodeAfterDeserialization();
+        }
+
+        public sealed override void UpdateNodeAfterDeserialization()
+        {
+            AddSlot(new Vector1MaterialSlot(kOutputSlotId, kOutputSlotName, kOutputSlotName, SlotType.Output, (int)0, ShaderStageCapability.Vertex));
+            RemoveSlotsNameNotMatching(new[] { kOutputSlotId });
+        }
+
+        public override string GetVariableNameForSlot(int slotId)
+        {
+            return string.Format("IN.{0}", ShaderGeneratorNames.VertexID);
+        }
+
+        public bool RequiresVertexID(ShaderStageCapability stageCapability)
+        {
+            return true;
+        }
+    }
+}

com.unity.shadergraph/Editor/Data/Nodes/Input/Scene/EyeIndexNode.cs

@@ -0,0 +1,34 @@
+using System.Reflection;
+
+namespace UnityEditor.ShaderGraph
+{
+    [Title("Input", "Scene", "Eye Index")]
+    class EyeIndexNode : CodeFunctionNode
+    {
+        public override bool hasPreview { get { return false; } }
+
+        public EyeIndexNode()
+        {
+            name = "Eye Index";
+        }
+
+        protected override MethodInfo GetFunctionToConvert()
+        {
+            return GetType().GetMethod("UnityGetEyeIndex", BindingFlags.Static | BindingFlags.NonPublic);
+        }
+
+        static string UnityGetEyeIndex([Slot(0, Binding.None)] out Vector1 Out)
+        {
+            return
+@"
+{
+#if defined(UNITY_SINGLE_PASS_STEREO) || defined(UNITY_STEREO_INSTANCING_ENABLED) || defined(UNITY_STEREO_MULTIVIEW_ENABLED)
+    Out = unity_StereoEyeIndex;
+#else
+    Out = 0;
+#endif
+}
+";
+        }
+    }
+}